This actually came packaged with my shampoo when I purchased it. The shampoo without the split end protector was the same price so I opted to get the bottle with the extra product. The scent of this smells really great. It has a very floral scent. It smells like fresh wildflowers. The split end protector is supposed to help seal your split ends and to keep them protected when you use heated styling tools. I think it actually does both. It seems to help keep my hair soft and frizz free when I apply it to my ends. I like that I can apply this wet or dry to the ends of my hair. It seems to seal the ends off and keep the splits from showing as bad. I also notice that if I apply this before curling or straightening my hair that my tips still feel soft to the touch. It's a great leave in conditioner and I actually apply it all over even though it's just for split ends. It helps calm my frizz which is an added bonus. I do have to reapply a few times throughout the day. Effectiveness It helps seal my split ends and keep them protected between hair cuts. Scent The smell is amazing. It smells like flowers.